EP4155609A1 - Procédé et appareil de commande pour faire fonctionner un appareil à brûleur à gaz - Google Patents

Procédé et appareil de commande pour faire fonctionner un appareil à brûleur à gaz Download PDF

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Publication number
EP4155609A1
EP4155609A1 EP21198885.2A EP21198885A EP4155609A1 EP 4155609 A1 EP4155609 A1 EP 4155609A1 EP 21198885 A EP21198885 A EP 21198885A EP 4155609 A1 EP4155609 A1 EP 4155609A1
Authority
EP
European Patent Office
Prior art keywords
gas
burner
air
fan
appliance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21198885.2A
Other languages
German (de)
English (en)
Inventor
Piet Blaauwwiekel
Uwe Deptolla
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pittway SARL
Original Assignee
Pittway SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pittway SARL filed Critical Pittway SARL
Priority to EP21198885.2A priority Critical patent/EP4155609A1/fr
Priority to PCT/EP2022/074782 priority patent/WO2023046466A1/fr
Priority to CN202280064345.6A priority patent/CN118043591A/zh
Publication of EP4155609A1 publication Critical patent/EP4155609A1/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/002—Regulating fuel supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling

Definitions

  • the invention relates to a method for operating a gas burner appliance. Further on, the invention relates to a controller for operating a gas burner appliance.
  • EP 2 667 097 A1 discloses a method for operating a gas burner appliance.
  • a gas/air mixture having a defined mixing ratio of gas and air is provided to a combustion chamber for combusting the gas/air mixture.
  • the mixing ratio of gas and air of the gas/air mixture corresponds to the so-called A-value of the gas/air mixture.
  • the gas/air mixture is provided by a mixing device mixing an air flow provided by an air duct with a gas flow provided by a gas duct.
  • the mixing device may be provided by a Venturi nozzle.
  • the air flow flowing through the air duct is provided by fan in such a way that the nominal fan speed of the fan depends on a nominal burner-load of the gas burner appliance, wherein the nominal burner-load corresponds to a nominal heat demand.
  • the fan speed range of the fan defines a so-called modulation range of the gas burner appliance.
  • the defined mixing ratio of gas and air and thereby the A-value of the gas/air mixture is kept constant over the entire modulation range of the gas burner appliance by a pneumatic gas flow regulator.
  • the pneumatic gas flow regulator is provided by a gas armature.
  • the gas armature comprises a safety gas valve and a throttle used for calibration.
  • the pneumatic gas flow regulator uses a pressure difference between the gas pressure of the gas flow in the gas duct and a reference pressure, wherein either the air pressure of the air flow in the air duct or the ambient pressure is used as reference pressure, and wherein the pressure difference between the gas pressure of the gas flow in the gas duct and the reference pressure is determined and controlled pneumatically.
  • EP 2 667 097 A1 discloses a method for operating a gas burner appliance in which the defined mixing ratio of the gas/air mixture is kept constant over the entire modulation range of the gas burner. This is done by the pneumatic gas flow regulator establishing a pneumatic control to keep the mixing ratio of gas and air within the gas/air mixture constant.
  • pneumatic gas flow regulator instead of using pneumatic gas flow regulator, it is also known from prior art to control the mixing ratio of gas and air within the gas/air mixture by an electric or electronic gas flow modulator.
  • the invention relates to a gas burner control making use of such an electric or electronic gas flow modulator.
  • DE 198 24 521 A1 , DE 199 22 226 C1 and EP 2 685 168 A1 all discloses a method to control the mixing ratio of gas and air of the gas/air mixture and thereby the A-value of the gas/air mixture on basis of a signal provided by an electrical or electronic sensor like an anemometer.
  • An actual value corresponding to a pressure ratio between a gas pressure in a gas duct and an air pressure in an air duct or corresponding to a pressure ratio between the gas pressure in the gas duct and the air pressure at the reference point is provided by the electrical or electronic sensor, wherein this actual value is compared with a nominal value.
  • a control variable for the electric or electronic gas flow modulator is generated on basis of the control deviation between the actual value and nominal value, wherein the electric gas flow modulator is adjusted on basis of this control variable to control the defined mixing ratio of gas and air in the gas/air mixture thereby keeping the A-value of the gas/air mixture constant.
  • the electrical or electronic sensor is connected between the gas duct and the air duct.
  • the electrical or electronic sensor is connected between the gas duct and a reference point.
  • EP 1 248 044 B1 discloses a method for starting up a gas burner appliance. For a burner start the gas burner appliance is operated with a burner load being smaller than the burner load of a nominal heat demand and being larger than a minimum burner load.
  • WO 2021/ 078 949 A1 discloses another method for operating a gas burner appliance. During a burner start the gas burner appliance is operated at a first A-value and after the burner start during regular combustion the gas burner appliance is operated at a second A-value, wherein the first A-value for the burner start is larger than the second A-value for regular combustion after the burner start.
  • JP 2 800 474 B2 discloses additional prior art.
  • the amount of the air flow and thereby the amount of the flow of the gas/air mixture having the defined mixing ratio of gas and air provided to the burner chamber depends on the desired burner load.
  • the nominal burner-load corresponds to a desired heat demand.
  • the nominal burner-load defines the fan speed at which the fan is operated.
  • the fan speed range of the fan of the gas burner appliance defines the modulation range of the gas burner appliance.
  • a maximum fan speed of the fan defines the maximum burner-load of the gas burner appliance. If a desired heat demand requires maximum burner load, then the fan is operated at maximum fan speed. If a desired heat demand requires burner-load being 50% of the maximum burner load, then the fan is operated at 50% of the maximum fan speed. If a desired heat demand requires burner-load being 20% of the maximum burner load, then the fan is operated at 20% of the maximum fan speed.
  • the mixing ratio of gas and air of the gas/air mixture is kept at a defined value, preferably constant.
  • the gas burner appliance is in a burner-off-phase in which no gas is combusted. If a heat demand occurs with the gas burner appliance being in a burner-off-phase, the gas burner appliance needs to be started by igniting a gas/air mixture. After the burner start, namely after igniting the gas/air mixture, the gas burner appliance combusts gas in a burner-on-phase.
  • the burner start of a gas burner appliance needs to be safe, particularly when as gas hydrogen becomes combusted.
  • the present invention provides a method for operating a gas burner appliance, providing a safe burner start even if hydrogen becomes combusted as gas.
  • the following steps are automatically executed in order to set-up the gas burner appliance for an upcoming burner start: Decrease during the actual burner-on-phase the opening position of the gas flow modulator. Keep the gas flow modulator at said decreased opening position and terminate the actual burner-on-phase of the gas burner appliance.
  • the opening position of the gas flow modulator is decreased by decreasing the fan speed of the fan to a defined fan speed while keeping the mixing ratio of gas and air of the of the gas/air mixture at the defined mixing ratio through the controller.
  • the fan speed will be automatically decreased to the defined fan speed and thereby also the opening position of the electric or electronic gas flow modulator will be automatically decreased to the decreased opening position.
  • This allows a safe upcoming burner start of the gas burner appliance, even if hydrogen becomes combusted as gas.
  • the mixing ratio and thereby A-value of the gas/air mixture used for the upcoming burner start being defined by the decreased opening position provided a lean gas/air mixture has a relatively high A-value compared to the A-value used and need after ignition during regular combustion.
  • the following steps are automatically executed for a burner start: Run the fan with a nominal fan speed depending on the new actual nominal heat demand of the gas burner appliance or run the fan at a predefined fixed fan speed while keeping the gas flow modulator at said decreased opening position determined during the previous burner-on-phase, thereby providing a gas/air mixture to the gas burner chamber having a mixing ratio of gas and air adapted for ignition. Ignite the gas/air mixture having the mixing ratio of gas and air adapted for ignition. After ignition of the gas/air mixture, adapt the opening position of the electric or electronic gas flow modulator such that the gas/air mixture has the defined mixing ratio of gas and air needed for regular combustion. This allows a safe burner start of the gas burner appliance, even if hydrogen becomes combusted as gas, and a stable combustion after the burner start.
  • the controller for operating a gas burner appliance according to the present invention is defined in claim 10.
  • the present invention relates to a method and a controller for operating a gas burner appliance.
  • Figure 1 shows a schematic view of a first exemplary gas burner appliance 10.
  • the gas burner appliance 10 comprises a combustion chamber 11 in which combustion of a gas/air mixture M having a defined mixing ratio of gas G and air A takes place during a regular combustion mode of the gas burner appliance 10, namely after a start-up of the gas burner appliance 10 and after successfully igniting the gas/air mixture M.
  • the combustion of the gas/air mixture M results into flames 12 and into exhaust gas E.
  • the flames 12 are monitored by a combustion quality sensor, preferably by a flame ionization sensor 13 providing as output signal an electrical flame ionization current.
  • the flame ionization sensor 13 provides its output signal to a controller 26.
  • the exhaust gas E emanates from the combustion chamber 11 through an exhaust pipe 28.
  • the gas/air mixture M is provided to the combustion chamber 11 of the gas burner appliance 10 by mixing a flow of the air A with a flow of the gas G.
  • a fan 14 sucks in air A flowing through an air duct 15 and gas G flowing through a gas duct 16.
  • An electrical or electronic gas flow modulator 18 being configured to adjust the gas flow through the gas duct 16 and a gas safety valve unit 19 having preferably two gas safety valves 19a, 19b are assigned to the gas duct 16.
  • the gas flow modulator 18 and the gas safety valves 19a, 19b are part of a gas armature 17.
  • the gas armature 17 may further comprise a sieve 20 and a pressure sensor 21.
  • the sieve 20 and the pressure sensor 21 are both assigned to the gas duct 16.
  • the gas safety valves 19a, 19b of the gas safety valve unit 19 are operated by electric coils 22 being part of the gas armature 17. In a regular combustion mode, the electric coils 22 are energized by the controller 26 to open the gas safety valves 19a, 19b. In burner-off phases the gas safety valves 19a, 19b are closed.
  • each gas safety valve 19a, 19b is operated by one separate electric coil 22. With the use of separate electric coils 22 it is possible to open and close the gas safety valves 19a, 19b independently from each other. Alternatively, the gas safety valves 19a, 19b may be operated commonly by a common electric coil 22.
  • the electrical or electronic gas flow modulator 18 is operated by a motor 23 also having an electric coil 24.
  • the gas flow modulator 18 is an electric gas flow modulator 18 operated by the controller 26.
  • the gas/air mixture M having the defined mixing ratio of gas G and air A is provided to the combustion chamber 11 of the gas burner appliance 10.
  • the gas/air mixture M is provided by mixing the air flow A provided by an air duct 15 with a gas flow G provided by a gas duct 16.
  • the airflow and the gas flow become preferably mixed by a mixing device 25.
  • the mixing device 25 may be a venturi nozzle.
  • the quantity of the air flow A and thereby the quantity of the gas/air mixture flow M is adjusted by the fan 14, namely by the speed of the fan 14.
  • the fan speed can be adjusted on basis of a nominal burner-load.
  • the nominal burner load corresponds to a nominal heat demand.
  • a nominal fan speed of the fan 14 depends on the nominal burner load.
  • the fan 14 is operated by the controller 26.
  • the fan speed range of the fan 14 defines a modulation range of the gas burner appliance 10.
  • a modulation of "1" means that the fan 14 is operated at maximum fan speed and thereby at a maximum load of the gas burner appliance 10.
  • a modulation of "2" means that the fan 14 is operated at 50% of the maximum fan speed and a modulation of "5" means that the fan 14 is operated at 20% of the maximum fan speed.
  • the defined mixing ratio of gas G and air A within the gas/air mixture M and thereby the A-value of the gas/air mixture M is kept at a nominal value, preferably constant, over the entire modulation range of the gas burner appliance 10.
  • Said defined mixing ratio of gas G and air A or said A-value of the gas/air mixture M is kept at a defined value over the modulation range of the gas burner appliance 10 using the electrical or electronic gas flow modulator 18 of a gas armature 17 to keep the defined mixing ratio of gas and air and thereby the A-value preferably constant over the modulation range of the gas burner appliance.
  • the control variable for the electric gas flow modulator 18 in order to keep the A-value constant is generated by the controller 26 on basis of the flame ionization signal provided by the flame ionization sensor 13.
  • the flame ionization sensor 13 is a sensor that allows a fail-safe determination of the mixing ratio of gas G an air A of the gas/air mixture M.
  • FIG. 2 a shows schematic view of other exemplary gas burner appliance 10'.
  • identical reference numbers are used for identical parts. In order to avoid unnecessary repetitions, below only the differences of the gas burner appliances 10, 10' will be described.
  • the electric or electronic sensor 27 may provide to the controller 26 an actual value corresponding to a pressure ratio between a gas pressure in a gas duct 16 and an air pressure in an air duct 15 or corresponding to a pressure ratio between the gas pressure in the gas duct 16 and the air pressure at the reference point, wherein the controller 26 may compare said actual value with a nominal value.
  • the controller 26 may generate the control variable for the electric gas flow modulator 18 on basis of the control deviation between the actual value and the nominal value, wherein the gas flow modulator 18 may be operated on basis of this control variable to keep over the entire modulation range of the gas burner appliance 10 the defined mixing ratio of gas and air and thereby the A-value at a defined value, preferably constant.
  • the electric or electronic sensor 27 allows a fail-safe determination of the mixing ratio of gas G an air A of the gas/air mixture M.
  • the present invention provides a method for operating gas burner appliances 10, 10'.
  • the invention is preferably used in combination with the gas burner appliances 10, 10' shown in Figures 1 and 2 .
  • the invention may also be used to operate other gas burner appliances making use of an electric or electronic gas flow modulator and of an electrical or electronic sensor that allows a fail-safe determination of the mixing ratio of gas G an air A of the gas/air mixture M.
  • a flow of the gas/air mixture M is provided to the burner chamber 11 of the gas burner appliance 10, 10', the gas/air mixture M having a defined mixing ratio of gas G and air A needed for a regular combustion of the gas/air mixture M within the burner chamber 11.
  • Said gas/air mixture M is provided by the mixing device 25 of the gas burner appliance 10, 10' mixing the air flow with the gas flow.
  • the air flow or the flow of the gas/air mixture M is provided by the fan 14 of the gas burner appliance 10, 10' in such a way that the fan speed of the fan 14 depends on the actual nominal heat demand of the gas burner appliance 10, 10'.
  • Said defined mixing ratio of gas G and air A of the gas/air mixture M is controlled by a controller 26 using as input a signal provided by the sensor 13, 27 and providing as output a control variable for an electric or electronic gas flow modulator 18 in order to keep the mixing ratio of gas G and air A of the gas/air mixture M at the defined mixing ratio over the modulation range of the gas burner appliance 10, 10'.
  • steps i) and ii) are automatically executed by the controller 26 in order to set-up the gas burner appliance 10, 10' for an upcoming burner start.
  • the invention allows a safe burner start of the gas burner appliance 10, 10' even if hydrogen becomes combusted as gas. Most preferably, the invention is used for operating a gas burner appliance 10, 10' combusting as gas hydrogen.
  • the invention further provides the controller 26 being configured to operate the gas burner appliance 10, 10' according to the above method.
  • the controller 26 is configured to automatically execute the following steps if the actual nominal heat demand of the gas burner appliance 10, 10' is no longer present in order to set-up the gas burner appliance 10, 10' for an upcoming burner start: Decrease during the actual burner-on-phase the fan speed of the fan 14 to a defined fan speed while keeping the mixing ratio of gas G and air A of the gas/air mixture M at the defined mixing ratio thereby decreasing the opening position of the electric or electronic gas flow modulator 18. Keep the electric or electronic gas flow modulator 18 at said decreased opening position and terminate the actual burner-on-phase of the gas burner appliance 10, 10'.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
EP21198885.2A 2021-09-24 2021-09-24 Procédé et appareil de commande pour faire fonctionner un appareil à brûleur à gaz Pending EP4155609A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP21198885.2A EP4155609A1 (fr) 2021-09-24 2021-09-24 Procédé et appareil de commande pour faire fonctionner un appareil à brûleur à gaz
PCT/EP2022/074782 WO2023046466A1 (fr) 2021-09-24 2022-09-07 Procédé et dispositif de commande d'actionnement d'appareil à brûleur à gaz
CN202280064345.6A CN118043591A (zh) 2021-09-24 2022-09-07 用于操作气体燃烧器器具的方法和控制器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21198885.2A EP4155609A1 (fr) 2021-09-24 2021-09-24 Procédé et appareil de commande pour faire fonctionner un appareil à brûleur à gaz

Publications (1)

Publication Number Publication Date
EP4155609A1 true EP4155609A1 (fr) 2023-03-29

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ID=78086219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21198885.2A Pending EP4155609A1 (fr) 2021-09-24 2021-09-24 Procédé et appareil de commande pour faire fonctionner un appareil à brûleur à gaz

Country Status (3)

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EP (1) EP4155609A1 (fr)
CN (1) CN118043591A (fr)
WO (1) WO2023046466A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09210349A (ja) * 1996-02-02 1997-08-12 Samson Co Ltd ボイラのインバータによる風量調整方法
JP2800474B2 (ja) 1991-06-06 1998-09-21 三浦工業株式会社 燃焼装置における着火時の風量制御方法
DE19824521A1 (de) 1998-06-02 1999-12-09 Honeywell Bv Regeleinrichtung für Gasbrenner
DE19922226C1 (de) 1999-05-14 2000-11-30 Honeywell Bv Regeleinrichtung für Gasbrenner
EP1248044B1 (fr) 2001-03-26 2008-05-28 Vaillant GmbH Procédé de démarrage d'une chaudière
EP2667097A1 (fr) 2012-05-24 2013-11-27 Honeywell Technologies Sarl Procédé de fonctionnement dýun brûleur à gaz
EP2685168A1 (fr) 2012-07-13 2014-01-15 Honeywell Technologies Sarl Procédé et contrôleur de fonctionnement dýun brûleur à gaz
US20150354809A1 (en) * 2014-06-04 2015-12-10 Lochinvar, Llc Modulating Burner With Venturi Damper
WO2021078949A1 (fr) 2019-10-25 2021-04-29 Bekaert Combustion Technology B.V. Brûleur à prémélange gazeux entièrement prémélangé stabilisé en surface pour brûler de l'hydrogène gazeux, et procédé de démarrage d'un tel brûleur

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2800474B2 (ja) 1991-06-06 1998-09-21 三浦工業株式会社 燃焼装置における着火時の風量制御方法
JPH09210349A (ja) * 1996-02-02 1997-08-12 Samson Co Ltd ボイラのインバータによる風量調整方法
DE19824521A1 (de) 1998-06-02 1999-12-09 Honeywell Bv Regeleinrichtung für Gasbrenner
DE19922226C1 (de) 1999-05-14 2000-11-30 Honeywell Bv Regeleinrichtung für Gasbrenner
EP1248044B1 (fr) 2001-03-26 2008-05-28 Vaillant GmbH Procédé de démarrage d'une chaudière
EP2667097A1 (fr) 2012-05-24 2013-11-27 Honeywell Technologies Sarl Procédé de fonctionnement dýun brûleur à gaz
EP2685168A1 (fr) 2012-07-13 2014-01-15 Honeywell Technologies Sarl Procédé et contrôleur de fonctionnement dýun brûleur à gaz
US20150354809A1 (en) * 2014-06-04 2015-12-10 Lochinvar, Llc Modulating Burner With Venturi Damper
WO2021078949A1 (fr) 2019-10-25 2021-04-29 Bekaert Combustion Technology B.V. Brûleur à prémélange gazeux entièrement prémélangé stabilisé en surface pour brûler de l'hydrogène gazeux, et procédé de démarrage d'un tel brûleur

Also Published As

Publication number Publication date
CN118043591A (zh) 2024-05-14
WO2023046466A1 (fr) 2023-03-30

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